Issue 3, 2012

Toward quantum-dot cellular automata units: thiolated-carbazole linked bisferrocenes

Abstract

Quantum-dot Cellular Automata (QCA) exploit quantum confinement, tunneling and electrostatic interaction for transistorless digital computing. Implementation at the molecular scale requires carefully tailored units which must obey several structural and functional constraints, ranging from the capability to confine charge efficiently on different ‘quantum-dot centers’—in order to sharply encode the Boolean states—up to the possibility of having their state blanked out upon application of an external signal. In addition, the molecular units must preserve their geometry in the solid state, to interact electrostatically in a controlled way. Here, we present a novel class of organometallic molecules, 6-3,6-bis(1-ethylferrocen)-9H-carbazol-9-yl-6-hexan-1-thiols, which are engineered to satisfy all such crucial requirements at once, as confirmed by electrochemistry and scanning tunneling microscopy measurements, and first principles density functional calculations.

Graphical abstract: Toward quantum-dot cellular automata units: thiolated-carbazole linked bisferrocenes

Supplementary files

Article information

Article type
Paper
Submitted
01 Aug 2011
Accepted
10 Nov 2011
First published
12 Dec 2011

Nanoscale, 2012,4, 813-823

Toward quantum-dot cellular automata units: thiolated-carbazole linked bisferrocenes

V. Arima, M. Iurlo, L. Zoli, S. Kumar, M. Piacenza, F. Della Sala, F. Matino, G. Maruccio, R. Rinaldi, F. Paolucci, M. Marcaccio, P. G. Cozzi and A. P. Bramanti, Nanoscale, 2012, 4, 813 DOI: 10.1039/C1NR10988J

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